queue/PCI-Remove-pci_resource_bar-and-pci_iov_resource_bar.patch

From f855fc1c72b39a681f4946e31c612b96b8f05e75 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Mon, 28 Nov 2016 16:51:19 -0600
Subject: [PATCH] PCI: Remove pci_resource_bar() and pci_iov_resource_bar()

commit 286c2378aaccc7343ebf17ec6cd86567659caf70 upstream.

pci_std_update_resource() only deals with standard BARs, so we don't have
to worry about the complications of VF BARs in an SR-IOV capability.

Compute the BAR address inline and remove pci_resource_bar().  That makes
pci_iov_resource_bar() unused, so remove that as well.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index f72968508a0d..f591b8fb029b 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -551,24 +551,6 @@ void pci_iov_release(struct pci_dev *dev)
 }
 
 /**
- * pci_iov_resource_bar - get position of the SR-IOV BAR
- * @dev: the PCI device
- * @resno: the resource number
- *
- * Returns position of the BAR encapsulated in the SR-IOV capability.
- */
-int pci_iov_resource_bar(struct pci_dev *dev, int resno)
-{
-	if (resno < PCI_IOV_RESOURCES || resno > PCI_IOV_RESOURCE_END)
-		return 0;
-
-	BUG_ON(!dev->is_physfn);
-
-	return dev->sriov->pos + PCI_SRIOV_BAR +
-		4 * (resno - PCI_IOV_RESOURCES);
-}
-
-/**
  * pci_iov_update_resource - update a VF BAR
  * @dev: the PCI device
  * @resno: the resource number
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 24db77ea5093..d7d558f8b2ec 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -4793,36 +4793,6 @@ int pci_select_bars(struct pci_dev *dev, unsigned long flags)
 }
 EXPORT_SYMBOL(pci_select_bars);
 
-/**
- * pci_resource_bar - get position of the BAR associated with a resource
- * @dev: the PCI device
- * @resno: the resource number
- * @type: the BAR type to be filled in
- *
- * Returns BAR position in config space, or 0 if the BAR is invalid.
- */
-int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type)
-{
-	int reg;
-
-	if (resno < PCI_ROM_RESOURCE) {
-		*type = pci_bar_unknown;
-		return PCI_BASE_ADDRESS_0 + 4 * resno;
-	} else if (resno == PCI_ROM_RESOURCE) {
-		*type = pci_bar_mem32;
-		return dev->rom_base_reg;
-	} else if (resno < PCI_BRIDGE_RESOURCES) {
-		/* device specific resource */
-		*type = pci_bar_unknown;
-		reg = pci_iov_resource_bar(dev, resno);
-		if (reg)
-			return reg;
-	}
-
-	dev_err(&dev->dev, "BAR %d: invalid resource\n", resno);
-	return 0;
-}
-
 /* Some architectures require additional programming to enable VGA */
 static arch_set_vga_state_t arch_set_vga_state;
 
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 517bc2677489..73b7647619af 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -242,7 +242,6 @@ bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
 int pci_setup_device(struct pci_dev *dev);
 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
 		    struct resource *res, unsigned int reg);
-int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
 void pci_configure_ari(struct pci_dev *dev);
 void __pci_bus_size_bridges(struct pci_bus *bus,
 			struct list_head *realloc_head);
@@ -286,7 +285,6 @@ static inline void pci_restore_ats_state(struct pci_dev *dev)
 #ifdef CONFIG_PCI_IOV
 int pci_iov_init(struct pci_dev *dev);
 void pci_iov_release(struct pci_dev *dev);
-int pci_iov_resource_bar(struct pci_dev *dev, int resno);
 void pci_iov_update_resource(struct pci_dev *dev, int resno);
 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
 void pci_restore_iov_state(struct pci_dev *dev);
@@ -301,10 +299,6 @@ static inline void pci_iov_release(struct pci_dev *dev)
 
 {
 }
-static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno)
-{
-	return 0;
-}
 static inline void pci_restore_iov_state(struct pci_dev *dev)
 {
 }
diff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c
index 695f32daf466..182d0f065a42 100644
--- a/drivers/pci/setup-res.c
+++ b/drivers/pci/setup-res.c
@@ -32,7 +32,6 @@ static void pci_std_update_resource(struct pci_dev *dev, int resno)
 	u16 cmd;
 	u32 new, check, mask;
 	int reg;
-	enum pci_bar_type type;
 	struct resource *res = dev->resource + resno;
 
 	if (dev->is_virtfn) {
@@ -66,14 +65,16 @@ static void pci_std_update_resource(struct pci_dev *dev, int resno)
 	else
 		mask = (u32)PCI_BASE_ADDRESS_MEM_MASK;
 
-	reg = pci_resource_bar(dev, resno, &type);
-	if (!reg)
-		return;
-	if (type != pci_bar_unknown) {
+	if (resno < PCI_ROM_RESOURCE) {
+		reg = PCI_BASE_ADDRESS_0 + 4 * resno;
+	} else if (resno == PCI_ROM_RESOURCE) {
 		if (!(res->flags & IORESOURCE_ROM_ENABLE))
 			return;
+
+		reg = dev->rom_base_reg;
 		new |= PCI_ROM_ADDRESS_ENABLE;
-	}
+	} else
+		return;
 
 	/*
 	 * We can't update a 64-bit BAR atomically, so when possible,
-- 
2.12.0